Improvement in spring-couplings for mattresses, seats



I UNITED STATES PATENT OFFICE.

YVILLIAM B. JUDSON, OF NEW YORK, N. Y.

IMPROVEMENT IN SPRiNG-COUPLINGS FOR MATTRESSES, SEATS, &c.

Specification forming part of Letters Patent No. 134,893, dated January14, 1873.

To all whom it may concern:

Be it known that I, WILLIAM B. J UDsoN, of New York city, in the countyand State of New York, have invented a new and useful Improvement inSpring Couplings for Mattresses, Seats, and" other purposes, of whichthe following is a specification:

Referring to the drawing which forms a part of this specification, andon which the same letters of reference indicate corresponding parts,Figure 1 is a plan view of a portion of a complete mattress, showing theapplication of my improvement. Fig. 2 is a detached perspective view ofmy improved loop or clamp; Fig. 4 is a cross-section of the same; andFig. 6, a horizontal section of the same. Fig. 3 is aperspective view ofa modification of my improvement; Fig. 5, a cross-section of the same;and Fig. 7, a horizontal section of the same.

This improvement relates to that class of springs known as spiral orhelical springs, of which mattresses, seats, &c., are composed, and inwhich such springs are ordinarily combined in series. The severalsprings composing the series are ordinarily fastened together by cordswhich are twined around the conjoining rims or upper and lower spiralsof each spring, or by metallic loops or clamps.

In the use of metallic loops or clamps difficulty has heretofore beenencountered in providing a fastening that will firmly gripe and holdfast upon the springs without slipping. When slippage of the loops orclamps takes place the loops are displaced, and the bed or seat becomesloose, rickety, and noisy; the slippage is therefore highlyobjectionable. Narrow loops have heretofore been used, and in order toovercome the objection just mentioned it has been common to make anindent or recess in the circular portion of the springs, which recesshas a straight portion of wire on which the fastening loop turns, andalso shoulders to prevent the slippage of the loop from its properposition. 'The formation of these recesses and shoulders is a matter ofsome difficulty and expense.

er deviation from the ordinary circular form V of springs, which is theeasiest and cheapest form in which theycan be manufactured.

In carrying out my improvement I rovide a metallic clamp or loop of anysuitable malleable metal capable of being bent into the form or positiondesired, and shown at A. This clamp or loop is to be proportioned inwidth to the diameter or circle of the springs to which it is applied,and is to be of such width that when it is compressed upon the springs Bthe said loop or clamp will firmly bind at its two extremities upon theinner edges at it of the springs B, while the convex backs of the twosprings will be brought'in contact and firmly held pressed together. Theelongated form of the loop or clampA, as compared with the diameter ofthe circle of the springs, thus prevents all slippage of the loop, anddispenses with the use of all other devices for the prevention ofslippage. A packing of leather, (1., is introduced when desired withinthe loop or clamp.

When it is desired to space or separate the springs by an interval ofspace I. provide the form of clamp A, shown in Figs. 3, 5, and '7, whichmay be termed a double-loop clamp, the extremities of which turn overseparately upon separate springs B as shown. Each end of such loop orclamp A binds upon the inner edges of the spring B at while the convexpart of the spring is grasped by the outer lip of the loop at z z. Apacking, a, may be used in connection with these double loops, ifdesired.

It is obvious that if the springs were connected by a wire-loop or anarrow loop there would be slippage of the fastening, which it is theobject of my invention to prevent, and which object I accomplish bypropertioning the width of the clamp to the degree of curvature of therims of the springs. The larger the diameter of the springs the greatermust be the width of the clamps in order to obtain a secure fastening.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The combination, herein described, of helical springs of mattresses witha metal plate, A, of a width proportioned to the diameter of the spring,and bent at its ends around the wires of the springs, substantially asand for the purpose specified.

WILLIAM B. JUDSON.

Witnesses:

T. B. MOSHER, F. O. BEACH.

